National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

88°F

31°C

Humidity 62%
Wind Speed N 8 mph
Barometer 30.07 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 14 Aug 9:52 am CDT
Extended Forecast for

Carbondale IL

Extreme Heat Warning August 14, 10:17am until August 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 14, 10:17am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Today

    High: 98 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 77. South wind 3 to 5 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 109. Southwest wind 3 to 6 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. South southwest wind 3 to 6 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. West wind around 6 mph.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Light and variable wind.

    Low: 75 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. North wind 3 to 8 mph.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. North wind around 6 mph becoming calm in the evening.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly sunny and hot, with a high near 98. Heat index values as high as 109. South southwest wind around 6 mph.
Tonight
Mostly clear, with a low around 77. South wind 3 to 5 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 109. Southwest wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 77. South southwest wind 3 to 6 mph.
Sunday
Sunny and hot, with a high near 100. West wind around 6 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Light and variable wind.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. North wind 3 to 8 mph.
Monday Night
Partly cloudy, with a low around 68. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 90. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 70. Light south southeast wind.
Wednesday
Mostly sunny, with a high near 96. Light south wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 5 to 7 mph becoming north northwest after midnight.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. North northwest wind 5 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
10:11 am CDT Aug 14, 2026
Forecast Valid:
10am CDT Aug 14, 2026-6pm CDT Aug 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation